Adding WidgetPreview utility.
Change-Id: Idfdf866400687e58304863c3c4f3dd3c4aed45b1
This commit is contained in:
Winson Chung
@@ -0,0 +1,322 @@
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/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.widgetpreview;
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import android.app.Activity;
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import android.appwidget.AppWidgetHost;
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import android.appwidget.AppWidgetHostView;
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import android.appwidget.AppWidgetManager;
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import android.appwidget.AppWidgetProviderInfo;
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import android.content.ActivityNotFoundException;
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import android.content.Intent;
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import android.content.res.Configuration;
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import android.content.res.Resources;
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import android.graphics.Bitmap;
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import android.graphics.Bitmap.CompressFormat;
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import android.graphics.Bitmap.Config;
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import android.graphics.Canvas;
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import android.net.Uri;
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import android.os.Bundle;
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import android.os.Environment;
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import android.util.Log;
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import android.view.View;
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import android.view.View.OnClickListener;
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import android.view.ViewGroup;
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import android.widget.Button;
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import android.widget.FrameLayout;
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import android.widget.Toast;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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public class WidgetPreviewActivity extends Activity implements OnClickListener {
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private static final String LOG_TAG = "WidgetPreviewActivity";
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private static final boolean DEBUG = true;
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private static final int APPWIDGET_HOST_ID = 2048;
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private static final int REQUEST_WIDGET = 0;
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private static final int REQUEST_CONFIGURE = 1;
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private AppWidgetHost mAppWidgetHost = null;
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private FrameLayout mAppWidgetFrame = null;
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private AppWidgetHostView mAppWidgetView = null;
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private int mAppWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID;
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private String mAppWidgetName;
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private int mPreviewWidth;
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private int mPreviewHeight;
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private Button mSnapshotButton = null;
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private Button mEmailButton = null;
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@Override
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_main);
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mAppWidgetFrame = (FrameLayout)findViewById(R.id.main_frame);
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mSnapshotButton = (Button)findViewById(R.id.snapshot_button);
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mSnapshotButton.setOnClickListener(this);
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mEmailButton = (Button)findViewById(R.id.email_button);
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mEmailButton.setOnClickListener(this);
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mAppWidgetHost = new AppWidgetHost(getApplicationContext(), APPWIDGET_HOST_ID);
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final Object retainedObj = getLastNonConfigurationInstance();
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if (retainedObj instanceof AppWidgetProviderInfo) {
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AppWidgetProviderInfo info = (AppWidgetProviderInfo) retainedObj;
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int id = mAppWidgetHost.allocateAppWidgetId();
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AppWidgetManager.getInstance(getBaseContext()).bindAppWidgetId(id, info.provider);
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setAppWidget(id);
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} else {
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startChooseActivity();
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}
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}
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@Override
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public void onStart() {
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super.onStart();
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mAppWidgetHost.startListening();
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}
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@Override
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public Object onRetainNonConfigurationInstance() {
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AppWidgetProviderInfo info = AppWidgetManager.getInstance(
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getBaseContext()).getAppWidgetInfo(mAppWidgetId);
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return info;
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}
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private void startChooseActivity() {
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int id = mAppWidgetHost.allocateAppWidgetId();
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Intent selectIntent = new Intent(AppWidgetManager.ACTION_APPWIDGET_PICK);
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selectIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, id);
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startActivityForResult(selectIntent, REQUEST_WIDGET);
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}
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@Override
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public void onActivityResult(int requestCode, int resultCode, Intent data) {
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if (requestCode == REQUEST_WIDGET) {
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if (data != null) {
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int appWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID;
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if (data.hasExtra(AppWidgetManager.EXTRA_APPWIDGET_ID)) {
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appWidgetId = data.getExtras().getInt(AppWidgetManager.EXTRA_APPWIDGET_ID);
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}
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if (resultCode == RESULT_OK) {
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setAppWidget(appWidgetId);
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} else {
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mAppWidgetHost.deleteAppWidgetId(appWidgetId);
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finish();
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}
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} else {
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finish();
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}
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} else if (requestCode == REQUEST_CONFIGURE) {
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if (data != null) {
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int appWidgetId = data.getExtras().getInt(
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AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);
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if (resultCode == RESULT_OK) {
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finishSetAppWidget(appWidgetId);
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} else {
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mAppWidgetHost.deleteAppWidgetId(appWidgetId);
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}
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}
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}
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}
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private void setAppWidget(int appWidgetId) {
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if (mAppWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID) {
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mAppWidgetHost.deleteAppWidgetId(mAppWidgetId);
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}
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/* Check for configuration */
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AppWidgetProviderInfo providerInfo =
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AppWidgetManager.getInstance(getBaseContext()).getAppWidgetInfo(appWidgetId);
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if (providerInfo.configure != null) {
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Intent configureIntent = new Intent(AppWidgetManager.ACTION_APPWIDGET_CONFIGURE);
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configureIntent.setComponent(providerInfo.configure);
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configureIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
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if (configureIntent != null) {
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try {
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startActivityForResult(configureIntent, REQUEST_CONFIGURE);
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} catch (ActivityNotFoundException e) {
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Log.d(LOG_TAG, "Configuration activity not found: " + e);
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Toast errorToast = Toast.makeText(
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getBaseContext(), R.string.configure_error, Toast.LENGTH_SHORT);
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errorToast.show();
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}
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}
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} else {
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finishSetAppWidget(appWidgetId);
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}
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}
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private void finishSetAppWidget(int appWidgetId) {
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AppWidgetProviderInfo providerInfo =
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AppWidgetManager.getInstance(getBaseContext()).getAppWidgetInfo(appWidgetId);
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if (providerInfo != null) {
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mAppWidgetView =
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mAppWidgetHost.createView(getBaseContext(), appWidgetId, providerInfo);
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int [] dimensions =
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getLauncherCellDimensions(providerInfo.minWidth, providerInfo.minHeight);
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mPreviewWidth = dimensions[0];
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mPreviewHeight = dimensions[1];
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mAppWidgetName =
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AppWidgetManager.getInstance(getBaseContext()).getAppWidgetInfo(appWidgetId).label;
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mAppWidgetName = mAppWidgetName.replaceAll("[^a-zA-Z0-9]", "_");
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ViewGroup.LayoutParams p = new ViewGroup.LayoutParams(
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ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
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mAppWidgetView.setLayoutParams(p);
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mAppWidgetFrame.removeAllViews();
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mAppWidgetHost.deleteAppWidgetId(mAppWidgetId);
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mAppWidgetFrame.addView(mAppWidgetView, mPreviewWidth, mPreviewHeight);
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mAppWidgetId = appWidgetId;
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}
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}
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// Taken from CellLayout.java
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public int[] getLauncherCellDimensions(int width, int height) {
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// Always assume we're working with the smallest span to make sure we
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// reserve enough space in both orientations.
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Resources resources = getResources();
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int cellWidth = resources.getDimensionPixelSize(R.dimen.workspace_cell_width);
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int cellHeight = resources.getDimensionPixelSize(R.dimen.workspace_cell_height);
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int widthGap = resources.getDimensionPixelSize(R.dimen.workspace_width_gap);
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int heightGap = resources.getDimensionPixelSize(R.dimen.workspace_height_gap);
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int previewCellSize = resources.getDimensionPixelSize(R.dimen.preview_cell_size);
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// This logic imitates Launcher's CellLayout.rectToCell.
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// Always round up to next largest cell
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int smallerSize = Math.min(cellWidth, cellHeight);
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int spanX = (width + smallerSize) / smallerSize;
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int spanY = (height + smallerSize) / smallerSize;
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// We use a fixed preview cell size so that you get the same preview image for
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// the same cell-sized widgets across all devices
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width = spanX * previewCellSize + ((spanX - 1) * widthGap);
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height = spanY * previewCellSize + ((spanY - 1) * heightGap);
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return new int[] { width, height };
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}
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private File buildFile(String name) {
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if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
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return null;
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}
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File path = Environment.getExternalStoragePublicDirectory(
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Environment.DIRECTORY_DOWNLOADS);
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int orientationCode = getResources().getConfiguration().orientation;
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String orientation;
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if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
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orientation = "landscape";
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} else if (orientationCode == Configuration.ORIENTATION_PORTRAIT) {
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orientation = "portrait";
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} else if (orientationCode == Configuration.ORIENTATION_SQUARE) {
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orientation = "square";
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} else {
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orientation = "undefined";
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}
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return new File(path, name + "_ori_" + orientation + ".png");
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}
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public Bitmap getPreviewBitmap() {
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mAppWidgetView.invalidate();
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Bitmap bmp = Bitmap.createBitmap(
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mAppWidgetView.getWidth(), mAppWidgetView.getHeight(), Config.ARGB_8888);
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Canvas c = new Canvas(bmp);
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mAppWidgetView.draw(c);
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return bmp;
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}
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private boolean saveImage(Bitmap bmp, String name) {
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File pic = buildFile(mAppWidgetName);
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if (pic == null) {
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Log.d(LOG_TAG, "External storage not present");
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return false;
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}
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pic.getParentFile().mkdirs();
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FileOutputStream fout = null;
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try {
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fout = new FileOutputStream(pic);
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if (!bmp.compress(CompressFormat.PNG, 100, fout)) {
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Log.d(LOG_TAG, "Failed to compress image");
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return false;
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}
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return true;
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} catch (IOException e) {
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Log.d(LOG_TAG, "Error writing to disk: " + e);
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} finally {
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try {
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if (fout != null) {
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fout.close();
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}
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} catch (IOException e) {
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Log.d(LOG_TAG, "Could not close file: " + e);
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}
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}
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return false;
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}
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@Override
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public void onBackPressed() {
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if (!getFragmentManager().popBackStackImmediate()) {
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startChooseActivity();
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}
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}
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@Override
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public void onClick(View v) {
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if (v == mSnapshotButton) {
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int textId = R.string.saving_preview;
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Toast preToast = Toast.makeText(getBaseContext(), textId, Toast.LENGTH_SHORT);
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preToast.show();
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Bitmap bmp = getPreviewBitmap();
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if (saveImage(bmp, mAppWidgetName)) {
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textId = R.string.preview_saved;
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} else {
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textId = R.string.preview_save_error;
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}
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Toast postToast = Toast.makeText(getBaseContext(), textId, Toast.LENGTH_SHORT);
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postToast.show();
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} else if (v == mEmailButton) {
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File file = buildFile(mAppWidgetName);
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if (file.exists()) {
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Intent emailIntent = new Intent(Intent.ACTION_SEND);
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emailIntent.setType("image/png");
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emailIntent.putExtra(Intent.EXTRA_SUBJECT,
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getResources().getString(R.string.email_subject));
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emailIntent.putExtra(Intent.EXTRA_TEXT,
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getResources().getString(R.string.email_body));
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emailIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(file));
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startActivity(emailIntent);
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} else {
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Toast postToast = Toast.makeText(
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getBaseContext(), R.string.no_preview, Toast.LENGTH_SHORT);
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postToast.show();
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}
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}
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}
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}
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